Exponential improving in the activity of Pt/C nanoparticles towards glycerol electrooxidation by Sb ad-atoms deposition

Caneppele, Gabriella L.; Almeida, Thiago Santos; Zanata, Cinthia R.; Teixeira‐Neto, Érico; Fernández, Pablo S.; Câmara, Giuseppe A.; Martins, Cauê A.

doi:10.1016/j.apcatb.2016.06.072

Cited by 47 publications

(35 citation statements)

References 28 publications

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“…In this context, decoration methods have been used to investigate the activity of bi‐metallic materials candidates to be used as anode of fuel cells and electrolyzers. Decoration may be interpreted as a controlled ad‐atom deposition, which can be reached by potentiostatic technique , potentiodynamic technique and most recently by wall‐jet configuration . The wall‐jet technique for electrochemical decoration is based on a well‐developed technology of batch injection analysis (BIA) .…”

Section: Introductionmentioning

confidence: 68%

“…The electrochemical profile of the Pt/C in sulfuric acid depicts well‐defined hydrogen under a potential deposition region (H UPD ), as shown in Figure S2. The region between 0.05–0.3 V during the positive potential sweep corresponds to the desorption of atomic hydrogen, and it is the most important region regarding the decoration process of the Pt surface .…”

Section: Resultsmentioning

confidence: 99%

“…Much effort has been spent to synthesize, characterize, and apply new multi‐metallic catalysts for glycerol electrooxidation reaction (GEOR) . Among the emerging catalysts, we should give special attention to Ru‐based materials, since their synthesis has been widely used and improved for almost 30 years .…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, a simpler system is desirable to shed light on the steps of the surface reaction. In this sense, one of the strategies to comprehensively understand the influence of an additional metal on a Pt surface is to use controlled ad‐atoms deposition .…”

Section: Introductionmentioning

confidence: 99%

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Decorating Pt/C Nanoparticles with Ru by Wall‐Jet Configuration: The Role of Coverage Degree on the Catalyst Activity for Glycerol Electrooxidation

Alencar

Martins

2018

Electroanalysis

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Here, we built Ru‐decorated Pt/C nanoparticles with different coverage degrees (θRu) by wall‐jet configuration for the first time, and we investigated their catalytic properties towards glycerol electrooxidation in acidic medium. Moreover, we used the most active catalysts as the anode in electrolysis to produce carbonyl compounds. The use of an electrochemical cell in wall‐jet configuration allows for the controlling of electrodeposition through easily handling parameters; namely, the θRu is controlled by changing the concentration of the metallic precursor, speed, and volume of injection onto a Pt/C‐modified glassy carbon electrode under applied potential. Excess of Ru on a Pt surface inhibits glycerol dissociative adsorption, which limits further electrooxidation; whereas low θRu do not provide surface oxygen species to the anodic reaction. Hence, intermediates θRu reveal active catalysts – namely, θRu=0.42 shifts the onset potential 170 mV towards lower values and increases 1.65‐fold the current density at 0.5 V. The stability of this catalyst is also enhanced by maintaining a more constant current density during successive potential cycles in the presence of glycerol and by avoiding Ru leaching from the surface. The electrolysis on Ru‐decorated Pt/C is shown to lead the reaction towards formic acid (‘high oxidation state’), decreasing the amounts of glyceradehyde, glycolic acid, and dihydroxyacetone, as a result of the improved catalytic properties.

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Section: Introductionmentioning

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Decorating Pt/C Nanoparticles with Ru by Wall‐Jet Configuration: The Role of Coverage Degree on the Catalyst Activity for Glycerol Electrooxidation

Alencar

Martins

2018

Electroanalysis

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“…Pt catalysts have extensively applied in electro‐oxidation of alcohols with high current density and low onset potential ,. Pt surface modified by foreign metals, such as Bi,, Sn,, Ag,, Pb,, and Sb, etc., can greatly improve the activity or vary the products selectivity. In particular, Bi‐modified Pt catalysts have caused great concern due to the huge boost of catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Synthesis Method and Promoter Content on Bismuth‐Modified Platinum Catalysts in the Electro‐oxidation of Glycerol and Formic Acid

et al. 2019

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Bismuth has an important promotion effect on the catalytic performance of Pt-catalyzed oxidation reactions. Herein, the catalyst structure, Bi content, and catalytic performance of Bimodified Pt catalysts in the electro-oxidation of glycerol and formic acid were researched to unravel the essential promotion role of Bi. The Bi-modification methods included the loading, adsorption, and electrodeposition of Bi on Pt. The electrodeposited Bi-modified Pt had the best performance among the three methods. In a certain range, the lower electrodeposition potential of Bi resulted in a higher Bi content on the Pt catalyst and better performance. The activity of the Pt catalyst with Bi deposited at À 0.15 V was 8.5 times and 27 times that of the monometallic Pt catalyst in the electro-oxidation of glycerol and formic acid, respectively. The selective distribution of Bi adjacent to Pt and a higher percentage of Bi hydroxide were favorable for the catalytic performance.[a] Dr.

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How to Change the Reaction Chemistry on Nonprecious Metal Oxide Nanostructure Materials for Electrocatalytic Oxidation of Biomass‐Derived Glycerol to Renewable Chemicals

Park

et al. 2022

Advanced Materials

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Au and Pt are well‐known catalysts for electrocatalytic oxidation of biomass‐derived glycerol. Although some nonprecious‐metal‐based materials to replace the costly Au and Pt are used for this reaction, the fundamental question of how the nonprecious catalysts affect the reaction chemistry and mechanism compared to Au and Pt catalysts is still unanswered. In this work, both experimental and computational methods are used to understand how and why the reaction performance and chemistry for the electrocatalytic glycerol oxidation reaction (EGOR) change with electrochemically‐synthesized CuCo‐oxide, Cu‐oxide, and Co‐oxide catalysts compared to conventional Au and Pt catalysts. The Au and Pt catalysts generate major glyceric acid and glycolic acid products from the EGOR. Interestingly, the prepared Cu‐based oxides produce glycolic acid and formic acid with high selectivity of about 90.0%. This different reaction chemistry is related to the enhanced ability of CC bond cleavage on the Cu‐based oxide materials. The density functional theory calculations demonstrate that the formic acids are mainly formed on the Cu‐based oxide surfaces rather than in the process of glycolic acid formation in the free energy diagram. This study provides critical scientific insights into developing future nonprecious‐based materials for electrochemical biomass conversions.

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Exponential improving in the activity of Pt/C nanoparticles towards glycerol electrooxidation by Sb ad-atoms deposition

Cited by 47 publications

References 28 publications

Decorating Pt/C Nanoparticles with Ru by Wall‐Jet Configuration: The Role of Coverage Degree on the Catalyst Activity for Glycerol Electrooxidation

Decorating Pt/C Nanoparticles with Ru by Wall‐Jet Configuration: The Role of Coverage Degree on the Catalyst Activity for Glycerol Electrooxidation

Effects of the Synthesis Method and Promoter Content on Bismuth‐Modified Platinum Catalysts in the Electro‐oxidation of Glycerol and Formic Acid

How to Change the Reaction Chemistry on Nonprecious Metal Oxide Nanostructure Materials for Electrocatalytic Oxidation of Biomass‐Derived Glycerol to Renewable Chemicals

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